[arnd-playground:randconfig-7.3-next 428/673] mm/mmap.c:630 __do_sys_mmap2() warn: bitwise AND condition is false here

[arnd-playground:randconfig-7.3-next 428/673] mm/mmap.c:630 __do_sys_mmap2() warn: bitwise AND condition is false here

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Arnd Bergmann <arnd@arndb.de>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-7.3-next
head:   0a1affa74ef2f2c5c5ee74fc604e47a1aefdd286
commit: 4d3c9be36cf7289309c7c25302ca4aa669df9032 [428/673] treewide: replace mmap_pgoff() with mmap2()
:::::: branch date: 6 days ago
:::::: commit date: 9 days ago
config: i386-randconfig-2200-20260925 (https://download.01.org/0day-ci/archive/20260926/202609260253.DKqZX8BZ-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
smatch: v0.5.0-9187-g5189e3fb

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202609260253.DKqZX8BZ-lkp@intel.com/

smatch warnings:
mm/mmap.c:630 __do_sys_mmap2() warn: bitwise AND condition is false here
mm/mmap.c:630 __do_sys_mmap2() warn: bitwise AND condition is false here

vim +630 mm/mmap.c

66f0dc481e5b80 Hugh Dickins      2009-12-30  625  
4d3c9be36cf728 Arnd Bergmann     2021-12-22  626  SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
a90f590a1bee36 Dominik Brodowski 2018-03-11  627  		unsigned long, prot, unsigned long, flags,
4d3c9be36cf728 Arnd Bergmann     2021-12-22  628  		unsigned long, fd, unsigned long, off_4k)
a90f590a1bee36 Dominik Brodowski 2018-03-11  629  {
4d3c9be36cf728 Arnd Bergmann     2021-12-22 @630  	if (off_4k & (~PAGE_MASK >> 12))
4d3c9be36cf728 Arnd Bergmann     2021-12-22  631  		return -EINVAL;
4d3c9be36cf728 Arnd Bergmann     2021-12-22  632  
4d3c9be36cf728 Arnd Bergmann     2021-12-22  633  	off_4k >>= (PAGE_SHIFT - 12);
4d3c9be36cf728 Arnd Bergmann     2021-12-22  634  
4d3c9be36cf728 Arnd Bergmann     2021-12-22  635  	return ksys_mmap_pgoff(addr, len, prot, flags, fd, off_4k);
a90f590a1bee36 Dominik Brodowski 2018-03-11  636  }
a90f590a1bee36 Dominik Brodowski 2018-03-11  637  

--
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https://github.com/intel/lkp-tests/wiki